Which of the following statements about the effect of surface area and vmodt c7g wfvj-)*s.f1olume on the cell’s pro.twcg1 -o*7fmdjfv )scesses is false?

  Which statement best describes stem cej4l ru aud9iugz,ncar s (. qn;m0-9t(lls?

  Which is a correct description of the cell type adapted for gas exchange in the4zd 4nqm(he p3 lunz43 qepdh( m4ngs?

  Which of the following explains the limitations on cell size?,)vw*,, xqacon )j ybu67gaey

  What is this cell's most likely primary kyck(c 16weuu20 u6 n*9k.kv hfplo r.function, and where could it be located in a mammal? *2 yuk9onw( kcprf.v ckule 16hu.0k6

  Which of the following characteristics of type I pneumocytes contric 2mt/ 5p geoaa-to)e+bute to increasing +c oe5-tmt 2pgoe/)a athe rate of gas exchange?
I.
Cells are flattened
II.
Secretion of a surfactant
III.
Cover less than 10% of the alveolar surface

  A patient receives a bone ma)trrfr,6t16,2o0sh hhjr t xc rrow transplant from a 36 year old. One of the functions of these cells is0srrtj 6)x,6hrch,rt2 ot f1 h to produce red and white blood cells. What type of stem cells has the patient received?

  Based on the Venn diagf+i/,njp- g5 zsao b9zram, which identifies cardiac muscle cells and striated muscle fib 9g nzojfb-/5sp+zai,res?

Below is a diagram of a motor neur66 kfvuf/xy1aon. Neurons are the longest cells in the human body. yvaffuk166 /x
1.Explain the factors that limit cell size in humans.
2.Explain how life functions are performed by Paramecium.

Premature babies sometimes suffer from infant rsis). sbm v y65iu6gc hqo*jz,6u b*5hespiratory distress syndrome, which could be caused by ag56h*5cjmoyz*s. h6bs u,)buv iq6 i s lack of sufficient surfactant in the pulmonary alveoli. The diagram below shows two different alveoli structures.


1.Describe one feature of the surfactant.

2.Suggest a treatment for infant respiratory distress syndrome.

3.Draw a labelled diagram of the structures in an alveolus that are important for gas exchange.

  Which of the following is a reason that embryonic stem c3 ) pfovjzg4dl c0s3l*ells are not used in the treatment of leukaemia4 gd*cv0olps jz3lf)3?

  The table shows the diame w.r4orq)3re-jj q8s xters of red blood cells from different organisms. Which red blood cell will have the highest surface area to volume r8- .wxqe)j3ro4 rsjr qatio?

1.Explain how the shape of erythrocytes and cells lining the proximaln; zq x8y+*j imn7qrw)jm 1zh8l(zl0w convoluted tubuljj w8*zx+y;h)mwz8r nz (qq i1lm0n 7le make these cells more adapted to the functions they perform.

2.Compare and contrast the structure of striated muscle cells and cardiac muscle fibres.

3.Explain how the structure of egg and sperm cells are adapted to their functions.

  Which statements about embryonic stk 59-yzkaon1r em cells and specialised cells is/are not trueoaknk -r 51y9z?

I. Embryonic stem cells have higher levels of DNA methylation than differentiated cells
II. Specialised cells are more differentiated than embryonic stem cells
III. Most specialised cells and embryonic stem cells both contain the entire genome of an organism

  In humans, which of the foy-z xspsi ):p1llowing is the correct order from smallest to largest? 1xzsiyp:-)sp

  Which row in the following table giv6g98clwy)9 xw4w 9wx)km iq dfes the correct disadvantages of the different stem cell sources for therapeutic use9)8dgxil) kx69wmyq 9 w4w fwcs?

1.Describe how the use of stem cells may be used to treat type I diabeteskn4othea7 *alo4s( 5r x(xw :n in theeax5 s:((74oaxktl 4r* whnon future.

2.Explain the factors that limit cell size in humans.

3.Explain how red blood cells and striated muscle fibres are adapted to their function.

Below are diagrams of specialised cenx1; mfp p ;:2f3gmhthlls (not to scale).

1.Put these cells in order of size, from the smallest to the largest.

2.Compare and contrast totipotent, pluripotent and multipotent stem cells.